From 3f3a73da37c0c8e8425b2c41e7b9ee18f2851656 Mon Sep 17 00:00:00 2001 From: Anders Ingemann Date: Fri, 16 Jan 2015 15:59:17 +0100 Subject: [PATCH] Add sensu_check module --- monitoring/sensu_check.py | 328 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 328 insertions(+) create mode 100644 monitoring/sensu_check.py diff --git a/monitoring/sensu_check.py b/monitoring/sensu_check.py new file mode 100644 index 00000000000..b968304c34f --- /dev/null +++ b/monitoring/sensu_check.py @@ -0,0 +1,328 @@ +#!/usr/bin/python +# -*- coding: utf-8 -*- + +# (c) 2014, Anders Ingemann +# +# This file is part of Ansible +# +# Ansible is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# Ansible is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with Ansible. If not, see . +# + +DOCUMENTATION = ''' +--- +module: sensu_check +short_description: Manage Sensu checks +version_added: 2.0 +description: + - Manage the checks that should be run on a machine by I(Sensu). + - Most options do not have a default and will not be added to the check definition unless specified. + - All defaults except I(path), I(state), I(backup) and I(metric) are not managed by this module, + - they are simply specified for your convenience. +options: + name: + description: + - The name of the check + - This is the key that is used to determine whether a check exists + required: true + state: + description: Whether the check should be present or not + choices: [ 'present', 'absent' ] + required: false + default: present + path: + description: + - Path to the json file of the check to be added/removed. + - Will be created if it does not exist (unless I(state=absent)). + - The parent folders need to exist when I(state=present), otherwise an error will be thrown + required: false + default: /etc/sensu/conf.d/checks.json + backup: + description: + - Create a backup file (if yes), including the timestamp information so + - you can get the original file back if you somehow clobbered it incorrectly. + choices: [ 'yes', 'no' ] + required: false + default: no + command: + description: + - Path to the sensu check to run (not required when I(state=absent)) + required: true + handlers: + description: + - List of handlers to notify when the check fails + required: false + default: [] + subscribers: + description: + - List of subscribers/channels this check should run for + - See sensu_subscribers to subscribe a machine to a channel + required: false + default: [] + interval: + description: + - Check interval in seconds + required: false + default: null + timeout: + description: + - Timeout for the check + required: false + default: 10 + handle: + description: + - Whether the check should be handled or not + choices: [ 'yes', 'no' ] + required: false + default: yes + subdue_begin: + description: + - When to disable handling of check failures + required: false + default: null + subdue_end: + description: + - When to enable handling of check failures + required: false + default: null + dependencies: + description: + - Other checks this check depends on, if dependencies fail, + - handling of this check will be disabled + required: false + default: [] + metric: + description: Whether the check is a metric + choices: [ 'yes', 'no' ] + required: false + default: no + standalone: + description: + - Whether the check should be scheduled by the sensu client or server + - This option obviates the need for specifying the I(subscribers) option + choices: [ 'yes', 'no' ] + required: false + default: no + publish: + description: + - Whether the check should be scheduled at all. + - You can still issue it via the sensu api + choices: [ 'yes', 'no' ] + required: false + default: yes + occurrences: + description: + - Number of event occurrences before the handler should take action + required: false + default: 1 + refresh: + description: + - Number of seconds handlers should wait before taking second action + required: false + default: null + aggregate: + description: + - Classifies the check as an aggregate check, + - making it available via the aggregate API + choices: [ 'yes', 'no' ] + required: false + default: no + low_flap_threshold: + description: + - The low threshhold for flap detection + required: false + default: null + high_flap_threshold: + description: + - The low threshhold for flap detection + required: false + default: null +requirements: [ ] +author: Anders Ingemann +''' + +EXAMPLES = ''' +# Fetch metrics about the CPU load every 60 seconds, +# the sensu server has a handler called 'relay' which forwards stats to graphite +- name: get cpu metrics + sensu_check: name=cpu_load + command=/etc/sensu/plugins/system/cpu-mpstat-metrics.rb + metric=yes handlers=relay subscribers=common interval=60 + +# Check whether nginx is running +- name: check nginx process + sensu_check: name=nginx_running + command='/etc/sensu/plugins/processes/check-procs.rb -f /var/run/nginx.pid' + handlers=default subscribers=nginx interval=60 + +# Stop monitoring the disk capacity. +# Note that the check will still show up in the sensu dashboard, +# to remove it completely you need to issue a DELETE request to the sensu api. +- name: check disk + sensu_check: name=check_disk_capacity +''' + + +def sensu_check(module, path, name, state='present', backup=False): + changed = False + reasons = [] + + try: + import json + except ImportError: + import simplejson as json + + try: + with open(path) as stream: + config = json.load(stream) + except IOError as e: + if e.errno is 2: # File not found, non-fatal + if state == 'absent': + reasons.append('file did not exist and state is `absent\'') + return changed, reasons + config = {} + else: + module.fail_json(msg=str(e)) + except ValueError: + msg = '{path} contains invalid JSON'.format(path=path) + module.fail_json(msg=msg) + + if 'checks' not in config: + if state == 'absent': + reasons.append('`checks\' section did not exist and state is `absent\'') + return changed, reasons + config['checks'] = {} + changed = True + reasons.append('`checks\' section did not exist') + + if state == 'absent': + if name in config['checks']: + del config['checks'][name] + changed = True + reasons.append('check was present and state is `absent\'') + + if state == 'present': + if name not in config['checks']: + check = {} + config['checks'][name] = check + changed = True + reasons.append('check was absent and state is `present\'') + else: + check = config['checks'][name] + simple_opts = ['command', + 'handlers', + 'subscribers', + 'interval', + 'timeout', + 'handle', + 'dependencies', + 'standalone', + 'publish', + 'occurrences', + 'refresh', + 'aggregate', + 'low_flap_threshold', + 'high_flap_threshold', + ] + for opt in simple_opts: + if module.params[opt] is not None: + if opt not in check or check[opt] != module.params[opt]: + check[opt] = module.params[opt] + changed = True + reasons.append('`{opt}\' did not exist or was different'.format(opt=opt)) + else: + if opt in check: + del check[opt] + changed = True + reasons.append('`{opt}\' was removed'.format(opt=opt)) + + if module.params['metric']: + if 'type' not in check or check['type'] != 'metric': + check['type'] = 'metric' + changed = True + reasons.append('`type\' was not defined or not `metric\'') + if not module.params['metric'] and 'type' in check: + del check['type'] + changed = True + reasons.append('`type\' was defined') + + if module.params['subdue_begin'] is not None and module.params['subdue_end'] is not None: + subdue = {'begin': module.params['subdue_begin'], + 'end': module.params['subdue_end'], + } + if 'subdue' not in check or check['subdue'] != subdue: + check['subdue'] = subdue + changed = True + reasons.append('`subdue\' did not exist or was different') + else: + if 'subdue' in check: + del check['subdue'] + changed = True + reasons.append('`subdue\' was removed') + + if changed and not module.check_mode: + if backup: + module.backup_local(path) + try: + with open(path, 'w') as stream: + stream.write(json.dumps(config, indent=2) + '\n') + except IOError as e: + module.fail_json(msg=str(e)) + + return changed, reasons + + +def main(): + + arg_spec = {'name': {'type': 'str', 'required': True}, + 'path': {'type': 'str', 'default': '/etc/sensu/conf.d/checks.json'}, + 'state': {'type': 'str', 'default': 'present', 'choices': ['present', 'absent']}, + 'backup': {'type': 'bool', 'default': 'no'}, + 'command': {'type': 'str'}, + 'handlers': {'type': 'list'}, + 'subscribers': {'type': 'list'}, + 'interval': {'type': 'int'}, + 'timeout': {'type': 'int'}, + 'handle': {'type': 'bool'}, + 'subdue_begin': {'type': 'str'}, + 'subdue_end': {'type': 'str'}, + 'dependencies': {'type': 'list'}, + 'metric': {'type': 'bool', 'default': 'no'}, + 'standalone': {'type': 'bool'}, + 'publish': {'type': 'bool'}, + 'occurrences': {'type': 'int'}, + 'refresh': {'type': 'int'}, + 'aggregate': {'type': 'bool'}, + 'low_flap_threshold': {'type': 'int'}, + 'high_flap_threshold': {'type': 'int'}, + } + + required_together = [['subdue_begin', 'subdue_end']] + + module = AnsibleModule(argument_spec=arg_spec, + required_together=required_together, + supports_check_mode=True) + if module.params['state'] != 'absent' and module.params['command'] is None: + module.fail_json(msg="missing required arguments: %s" % ",".join(['command'])) + + path = module.params['path'] + name = module.params['name'] + state = module.params['state'] + backup = module.params['backup'] + + changed, reasons = sensu_check(module, path, name, state, backup) + + module.exit_json(path=path, changed=changed, msg='OK', name=name, reasons=reasons) + +from ansible.module_utils.basic import * +main()